diff options
author | Dan Sinclair <dsinclair@chromium.org> | 2015-11-16 13:09:00 -0500 |
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committer | Dan Sinclair <dsinclair@chromium.org> | 2015-11-16 13:09:00 -0500 |
commit | 10cfea1fdafc8fcf1edd60bc783e9db9ef6229c0 (patch) | |
tree | 3cd1bc8e6a6b33391ea8ad83388a07ca4974f40b /core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp | |
parent | ec441e67745054ece5e3d736b60fffa2f7f8d20c (diff) | |
download | pdfium-10cfea1fdafc8fcf1edd60bc783e9db9ef6229c0.tar.xz |
Merge to XFA: Reland "Cleanup some numeric code.""
This reverts commit 0569ab0b11b723d9bca4ddd642b0cf8828c4bdd1.
This changes the various comparisons of char >= '0' && char <= '9' and
char < '0' || char > '9' to use std::isdigit checks. It also cleans up
a handful of hex to digit conversions to call one common method.
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1449873003 .
(cherry picked from commit 3f148915d12f54a946a0c0bf526162b79c39d650)
Review URL: https://codereview.chromium.org/1452673002 .
Diffstat (limited to 'core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp')
-rw-r--r-- | core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp | 163 |
1 files changed, 74 insertions, 89 deletions
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp index 543f8f6323..9318403766 100644 --- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp +++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.cpp @@ -13,6 +13,7 @@ #include "core/include/fpdfapi/fpdf_module.h" #include "core/include/fpdfapi/fpdf_page.h" #include "core/include/fpdfapi/fpdf_parser.h" +#include "core/include/fxcrt/fx_ext.h" #include "core/include/fxcrt/fx_safe_types.h" #include "core/src/fpdfapi/fpdf_page/pageint.h" #include "third_party/base/nonstd_unique_ptr.h" @@ -164,85 +165,83 @@ FX_DWORD CPDF_Parser::StartParse(IFX_FileRead* pFileAccess, m_bXRefStream = FALSE; m_LastXRefOffset = 0; m_bOwnFileRead = bOwnFileRead; + int32_t offset = GetHeaderOffset(pFileAccess); if (offset == -1) { - if (bOwnFileRead && pFileAccess) { + if (bOwnFileRead && pFileAccess) pFileAccess->Release(); - } return PDFPARSE_ERROR_FORMAT; } m_Syntax.InitParser(pFileAccess, offset); + uint8_t ch; - if (!m_Syntax.GetCharAt(5, ch)) { + if (!m_Syntax.GetCharAt(5, ch)) return PDFPARSE_ERROR_FORMAT; - } - if (ch >= '0' && ch <= '9') { - m_FileVersion = (ch - '0') * 10; - } - if (!m_Syntax.GetCharAt(7, ch)) { + if (std::isdigit(ch)) + m_FileVersion = FXSYS_toDecimalDigit(ch) * 10; + + if (!m_Syntax.GetCharAt(7, ch)) return PDFPARSE_ERROR_FORMAT; - } - if (ch >= '0' && ch <= '9') { - m_FileVersion += ch - '0'; - } - if (m_Syntax.m_FileLen < m_Syntax.m_HeaderOffset + 9) { + if (std::isdigit(ch)) + m_FileVersion += FXSYS_toDecimalDigit(ch); + + if (m_Syntax.m_FileLen < m_Syntax.m_HeaderOffset + 9) return PDFPARSE_ERROR_FORMAT; - } + m_Syntax.RestorePos(m_Syntax.m_FileLen - m_Syntax.m_HeaderOffset - 9); - if (!bReParse) { + if (!bReParse) m_pDocument = new CPDF_Document(this); - } + FX_BOOL bXRefRebuilt = FALSE; if (m_Syntax.SearchWord(FX_BSTRC("startxref"), TRUE, FALSE, 4096)) { FX_FILESIZE startxref_offset = m_Syntax.SavePos(); void* pResult = FXSYS_bsearch(&startxref_offset, m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), CompareFileSize); - if (pResult == NULL) { + if (!pResult) m_SortedOffset.Add(startxref_offset); - } + m_Syntax.GetKeyword(); FX_BOOL bNumber; CFX_ByteString xrefpos_str = m_Syntax.GetNextWord(bNumber); - if (!bNumber) { + if (!bNumber) return PDFPARSE_ERROR_FORMAT; - } + m_LastXRefOffset = (FX_FILESIZE)FXSYS_atoi64(xrefpos_str); if (!LoadAllCrossRefV4(m_LastXRefOffset) && !LoadAllCrossRefV5(m_LastXRefOffset)) { - if (!RebuildCrossRef()) { + if (!RebuildCrossRef()) return PDFPARSE_ERROR_FORMAT; - } + bXRefRebuilt = TRUE; m_LastXRefOffset = 0; } } else { - if (!RebuildCrossRef()) { + if (!RebuildCrossRef()) return PDFPARSE_ERROR_FORMAT; - } + bXRefRebuilt = TRUE; } FX_DWORD dwRet = SetEncryptHandler(); - if (dwRet != PDFPARSE_ERROR_SUCCESS) { + if (dwRet != PDFPARSE_ERROR_SUCCESS) return dwRet; - } + m_pDocument->LoadDoc(); - if (m_pDocument->GetRoot() == NULL || m_pDocument->GetPageCount() == 0) { - if (bXRefRebuilt) { + if (!m_pDocument->GetRoot() || m_pDocument->GetPageCount() == 0) { + if (bXRefRebuilt) return PDFPARSE_ERROR_FORMAT; - } + ReleaseEncryptHandler(); - if (!RebuildCrossRef()) { + if (!RebuildCrossRef()) return PDFPARSE_ERROR_FORMAT; - } + dwRet = SetEncryptHandler(); - if (dwRet != PDFPARSE_ERROR_SUCCESS) { + if (dwRet != PDFPARSE_ERROR_SUCCESS) return dwRet; - } + m_pDocument->LoadDoc(); - if (m_pDocument->GetRoot() == NULL) { + if (!m_pDocument->GetRoot()) return PDFPARSE_ERROR_FORMAT; - } } FXSYS_qsort(m_SortedOffset.GetData(), m_SortedOffset.GetSize(), sizeof(FX_FILESIZE), CompareFileSize); @@ -251,13 +250,12 @@ FX_DWORD CPDF_Parser::StartParse(IFX_FileRead* pFileAccess, ReleaseEncryptHandler(); RebuildCrossRef(); RootObjNum = GetRootObjNum(); - if (RootObjNum == 0) { + if (RootObjNum == 0) return PDFPARSE_ERROR_FORMAT; - } + dwRet = SetEncryptHandler(); - if (dwRet != PDFPARSE_ERROR_SUCCESS) { + if (dwRet != PDFPARSE_ERROR_SUCCESS) return dwRet; - } } if (m_pSecurityHandler && !m_pSecurityHandler->IsMetadataEncrypted()) { CPDF_Reference* pMetadata = @@ -461,9 +459,8 @@ FX_BOOL CPDF_Parser::LoadLinearizedCrossRefV4(FX_FILESIZE pos, int32_t offset = FXSYS_atoi(pEntry); if (offset == 0) { for (int32_t c = 0; c < 10; c++) { - if (pEntry[c] < '0' || pEntry[c] > '9') { + if (!std::isdigit(pEntry[c])) return FALSE; - } } } m_CrossRef.SetAtGrow(objnum, offset); @@ -562,9 +559,8 @@ bool CPDF_Parser::LoadCrossRefV4(FX_FILESIZE pos, FX_FILESIZE offset = (FX_FILESIZE)FXSYS_atoi64(pEntry); if (offset == 0) { for (int32_t c = 0; c < 10; c++) { - if (pEntry[c] < '0' || pEntry[c] > '9') { + if (!std::isdigit(pEntry[c])) return false; - } } } m_CrossRef.SetAtGrow(objnum, offset); @@ -632,28 +628,32 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { uint8_t byte = buffer[i]; switch (status) { case 0: - if (PDFCharIsWhitespace(byte)) { + if (PDFCharIsWhitespace(byte)) status = 1; - } - if (byte <= '9' && byte >= '0') { + + if (std::isdigit(byte)) { --i; status = 1; } + if (byte == '%') { inside_index = 0; status = 9; } + if (byte == '(') { status = 10; depth = 1; } + if (byte == '<') { inside_index = 1; status = 11; } - if (byte == '\\') { + + if (byte == '\\') status = 13; - } + if (byte == 't') { status = 7; inside_index = 1; @@ -662,10 +662,10 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { case 1: if (PDFCharIsWhitespace(byte)) { break; - } else if (byte <= '9' && byte >= '0') { + } else if (std::isdigit(byte)) { start_pos = pos + i; status = 2; - objnum = byte - '0'; + objnum = FXSYS_toDecimalDigit(byte); } else if (byte == 't') { status = 7; inside_index = 1; @@ -678,8 +678,8 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { } break; case 2: - if (byte <= '9' && byte >= '0') { - objnum = objnum * 10 + byte - '0'; + if (std::isdigit(byte)) { + objnum = objnum * 10 + FXSYS_toDecimalDigit(byte); break; } else if (PDFCharIsWhitespace(byte)) { status = 3; @@ -690,10 +690,10 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { } break; case 3: - if (byte <= '9' && byte >= '0') { + if (std::isdigit(byte)) { start_pos1 = pos + i; status = 4; - gennum = byte - '0'; + gennum = FXSYS_toDecimalDigit(byte); } else if (PDFCharIsWhitespace(byte)) { break; } else if (byte == 't') { @@ -705,8 +705,8 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { } break; case 4: - if (byte <= '9' && byte >= '0') { - gennum = gennum * 10 + byte - '0'; + if (std::isdigit(byte)) { + gennum = gennum * 10 + FXSYS_toDecimalDigit(byte); break; } else if (PDFCharIsWhitespace(byte)) { status = 5; @@ -721,9 +721,9 @@ FX_BOOL CPDF_Parser::RebuildCrossRef() { inside_index = 1; } else if (PDFCharIsWhitespace(byte)) { break; - } else if (byte <= '9' && byte >= '0') { + } else if (std::isdigit(byte)) { objnum = gennum; - gennum = byte - '0'; + gennum = FXSYS_toDecimalDigit(byte); start_pos = start_pos1; start_pos1 = pos + i; status = 4; @@ -1858,7 +1858,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() { break; case 1: if (ch >= '0' && ch <= '7') { - iEscCode = ch - '0'; + iEscCode = FXSYS_toDecimalDigit(ch); status = 2; break; } @@ -1883,7 +1883,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() { break; case 2: if (ch >= '0' && ch <= '7') { - iEscCode = iEscCode * 8 + ch - '0'; + iEscCode = iEscCode * 8 + FXSYS_toDecimalDigit(ch); status = 3; } else { buf.AppendChar(iEscCode); @@ -1893,7 +1893,7 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() { break; case 3: if (ch >= '0' && ch <= '7') { - iEscCode = iEscCode * 8 + ch - '0'; + iEscCode = iEscCode * 8 + FXSYS_toDecimalDigit(ch); buf.AppendChar(iEscCode); status = 0; } else { @@ -1918,48 +1918,33 @@ CFX_ByteString CPDF_SyntaxParser::ReadString() { } CFX_ByteString CPDF_SyntaxParser::ReadHexString() { uint8_t ch; - if (!GetNextChar(ch)) { + if (!GetNextChar(ch)) return CFX_ByteString(); - } + CFX_BinaryBuf buf; - FX_BOOL bFirst = TRUE; + bool bFirst = true; uint8_t code = 0; while (1) { - if (ch == '>') { + if (ch == '>') break; - } - if (ch >= '0' && ch <= '9') { - if (bFirst) { - code = (ch - '0') * 16; - } else { - code += ch - '0'; - buf.AppendByte((uint8_t)code); - } - bFirst = !bFirst; - } else if (ch >= 'A' && ch <= 'F') { - if (bFirst) { - code = (ch - 'A' + 10) * 16; - } else { - code += ch - 'A' + 10; - buf.AppendByte((uint8_t)code); - } - bFirst = !bFirst; - } else if (ch >= 'a' && ch <= 'f') { + + if (std::isxdigit(ch)) { + int val = FXSYS_toHexDigit(ch); if (bFirst) { - code = (ch - 'a' + 10) * 16; + code = val * 16; } else { - code += ch - 'a' + 10; + code += val; buf.AppendByte((uint8_t)code); } bFirst = !bFirst; } - if (!GetNextChar(ch)) { + + if (!GetNextChar(ch)) break; - } } - if (!bFirst) { + if (!bFirst) buf.AppendByte((uint8_t)code); - } + return buf.GetByteString(); } void CPDF_SyntaxParser::ToNextLine() { |